Pseudocepheids. I - R Puppis, HR 4441, HR 4511, and AI CMI

Abstract

view Abstract Citations (26) References (29) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Pseudocepheids. I. R Puppis, HR 4441, HR 4511, and AI CMi. Eggen, O. J. Abstract The pseudocepheids (PC) are defined as supergiants in the Hertzsprung gap with light variations more erratic than those of cepheids. The present paper is concerned with four PC that are probably all high-mass objects and which are representative of the current observing program. Intermediate band and Hβ photometry is used to derive light curves, reddening, color indices, absolute magnitudes and distances. R Pup and HR 4441 are apparently very high-luminosity stars for which the photometric indices are not complicated by photometrically unresolved companions or circumstellar material. HR 4511 illustrates the effect of a close, early-type companion, and the photometry of AI CMi may be strongly affected by circumstellar material. Publication: The Astronomical Journal Pub Date: March 1983 DOI: 10.1086/113323 Bibcode: 1983AJ.....88..386E Keywords: Stellar Envelopes; Stellar Luminosity; Stellar Spectrophotometry; Supergiant Stars; Variable Stars; Cepheid Variables; Early Stars; Hertzsprung-Russell Diagram; Interstellar Extinction; Light Curve; Stellar Color; Stellar Magnitude; Astronomy full text sources ADS | data products SIMBAD (51) GCPD (1) Related Materials (2) Part 2: 1983AJ.....88.1458E Part 3: 1986AJ.....91..890E